Swinging-door-control device for elevators



Of. 29, 1929. J; RlCE 1,733,906

' SWINGING DOOR CONTROL DEVICE. FOR ELEVATRS I Filed Sept. 15. 1927patented Oct. 29, 1929 u, UNITED? STATES P AreNr orricif'f:*Av i JOSEPHmenor CHICAGO, ILLINOIS, AssIGNon To ELnvATonooMPANY or AMERICA,

OF CHICAGO, ILLINOIS, VA CORPORATION OF ILLINOIS SWINGING-DOOR-CONTROLDEVICE FOR ELEVATORS Application led September 15, 1927. Serial No.219,689.'

My invention relates to door controlled mechanism for elevators and hasfor its object the provision of a door` control particu- V larlyapplicable to doors provided at the different landings of the elevatorshaft which are hinged to swing into and out of closing position'. l Y

It is a purpose of this invention to provide a door controlled mechanismof this characterwhich will lock the door in closed position so as toprevent unauthorized opening thereof but which willpermitthe door to beopen when the elevator car is at the particular landing where lthe dooris situated.v f Y vide a door locking mechanism which positively locksthe door in closed position and which may be released by turning theknob of the ordinary door latch. I

Another object of this invention is to provide in combination with thedoor locking mechanism hereinbefore mentioned means for closing theloperating circuit for Vthe ele.- vator car when the door is in closedposition and opening the same so as to prevent the operation of the'carunless the door is firmly locked in closed position. l f

Other objects and advantages of the invention will appear as thedescription proceeds when taken in connection with the accompanyingdrawings. However, I wish it to be distinctly Vunderstood that I do notintendrto limit myself to the exact details shown and described but thatI intend to avail myself Vof all such modifications as would occur toone skilled in this art and as fall within the scope of the claims. Y Y

In the drawings: Y j

' Fig. 1 is a side view taken from the interior of the'elevator shaft ofthe door controlled mechanism; Y

Fig. 2 isv an endvview of the door taken at right angles to Fig. 1 alongthe line 2-2 of Fig. 1; and

Fig. 3 isa diagrammatic sketch showing the position of the doorcontrolled contacts in the operating circuit for the elevator.

` Referring now in detail to the drawings, the numeral 5 indicates thecasing surrounding the door opening provided at a landing in Itis also apurpose of this invention to pro-y the elevator shaft. A door 6 ishinged to the casing 5 as shown at 7 in Fig. 2 so as kto swing outwardlywhen 1t is desired to enter a caraty the landing. This door is providedwith the regular door latch mechanism indicated by the latch 8,operating shaft 9 and door knob 10. The connection between the shaft 9and.k

the latch 8 may be of any standard construction that is used for doorlatches.v l Q f It will bernoted that the shaft. 9 does not extend allthe way through the door, but'isV provided with an enlarged portion 11adjav cent the outer face of the door, which portion 11 is provided witha recess to receive the key 12 in case it isdesired to unlock the doorfrom the outside. The key 12, obviously', isonlyV to be used in case ofemergencywhen for some exterior of the elevator shaft.

lThe shaft 9 is provided with a crank arm 13 to which is connected theupwardly extending rod 14 guided onthe door by means of the bracket 15and carrying at its upper end a roller 16 which is preferably made ofinsulating material. Adjacent the 'upper end purpose the doorrmust beopened 'fromthe of the rod 14 there is provided' a platell secured tothe door and having the inwardly projecting locking member 18 thereon.This locking member as shownl clearly in Fig.2 is provided with a pairof teeth 19 and 2O adapted to engage corresponding teeth 21 and 22 onthe lever arm 23 which isrpivoted to the housing 24 mounted on the doorcasing 5.v The shaft25 which serves as a pivot-V for the lever arm 23also hasth'e arm 26 preferably consisting of a fairly heavy metal bar Ysecured thereto. This arm extends toward ably the position in which thelatch 8 is ex-V tended to latch the door to the casing 5.

Now when it is desired torelease `the door,` the door knob 10 is rotatedin the direction indicated by the arrow in Fig. 1 which raises the rod14 and thereby the arm 26, and

through the shaft 25, the arm 23 so as to disengage the interlockingteeth on arm 23 and projection 18 and permit opening of the door. Inyorder to prevent leaving the doors open due to carelessness on the partof the operator of the elevator,Iprovide'within thecasi ing 24Qtparf ofSpring pressed contacts 28.

and 29 which are connected by means of the leads 3,0`and31and suitablewiring to the motog by-vvhich the'elevator car is driven".A

YAs is commonly the case, the elevator car" itself is equipped with `acontrol lever for operating the same, which control lever 33 also servesto close the circuit tothe'- motor 32.v Y v i-Gooperating withthespringl contacts 28 and:29 is the projectinglugx on thedoor 6' whichvlug hasta round head portion 36 eX- terding between the springcontacts28` and 29 to' completes-the circuit when the. door is incl'osedposition., rEhe projections 18 and 35am preferablymade of suchv lengththaty spring contacts 28and 29 so as, to make a goodA connection. Thismakes it necessary for the elevator operator in order to start his cartocompletely close and lock the door at Y each landing. l Y

V As afurther means of insuring the permanent locking of the door, thearm 23 is pressed downwardly byA means of the spring 37 monnted in the'housing'24. l

, From the above description it `is thought Y 0i that theV constructionand operation of Vthis device, will beclear to thoseskilled in the art Yarid; having thus .described my invention,

whatv- I claim and desire to secure by Letters Patent of the UnitedStates is:

,1; Doorcontrol Vmechanism for elevator installations wherein the doorsatthe di'ere'ntjfloovrrlevelsV are mounted to swing into and out ofclosing position, comprising interengaging locking members carried bysaid dor and theI door frame adapted to lockthe door'in closed position,contacts mountedv on theframe and adapted wh en' closed to completeaf'circuity for operating the elevator, means rigidly mounted on thedoor for connecting said contacts when the door is in closed positionand means for releasing said Llocking members andv opening the doorfrom`within the elevator shaft comprising a handle on Y said door andmechanism operable by movement of said handle to move one of saidlockingmembers out of engagement with the other to permit opening of said door.2. `Door control mechanism for elevator installatin's wherein the doorsat the different 63 Hoor levels are mounted to swing into and out ofclosing position, comprising interengaging locking members carried-bysaid door Y and the door frame, the member on the door vframe beingmovable to disengage said members, a door handle on said door accessiblefrom an elevator'ca-r atHsaid-doorfafjcrank arm connected tosaid handle,antllmeas* connected Withisaid crank arm for moving said movable membertopermit opening of said door. .75

3. D'oo'r'contro'lmechanism for elevator installations wherein-the-doorsat the different floorplevels Vare mounted to swing into and .ou-t ofclosing position-comprising interengaging locking members carried bysaid door,

andthe' doorn iframe, one'ofsaidmembers ble-l ing movable todisengagesaid meinbers3, a

door handle on said door. accessible from an elevator carat said door,-ran actuating arm connected te said movable member, meansy connected to.said handle `and engaging Said actuating arm whereby movement offsad'- Yhandle Kcauses Amovement of, said movable'v member and resilient meanscooperatingwithr sai-d movable member to urge they same into:

door locking position.

4.' Door control IncGbaniSlHiifl, installations wherein the doorsat'the,d-iiifer-Vl` ent ioor levels are mounted tey swingA intd and outof closing position,y comprisingnterengaging. locking membersfca-rriedbyl saidldoor, and the door frame,"y apair offcontacts on saiddoor frameadaptedwfhen connected to;

complete a circuit permittingthe-operation off-1 an ,elevator car,abridging member on; said door connecting said contactswhen said door is`in closed position, andv a ,knob having, means connected therewith todisengage said, locking. membersandpermit opening of said;V

- i641 5; Doorcontrolmec'hanism for elevaterin-y door .when said knob,is-gtnrned.

stallations wherein the doors at the dierent floor levels aremountedtoswing into and4 out of closing position, comprising interengag-l ing.locking members carried 'SaidI door, and the door frame,I a pair otcontact-son saiddoor frame adapted when, connected to plete a circuitpermitting the operatinpf an elevator car, a bridging member onsaliddoor connecting said contacts. whensaid door isi-n closed position,and al doorlnob having,

means connected therewith to disengage said locking members and permit.openingrof s a-i doorwhen' said knob is turned5, said means including varod movable vertically enfsaid door and having a roller at thetopvthereo and an actuating arm on one otsa-idlockingV door frameadapted when connected to oomplete a criouit permitting the operation ofan elevator car, a bridging member on said door connecting said contactswhen said door is in closed position, and a door knob having meansconnected therewith to disengage said locking members and permit openingof said door when said knob is turned, said locking members havingportions thereon for locking said door against opening prior toengagement of said bridging member with said contacts, when the door isbeing moved from open to closed position.

7 Door control mechanism for elevators comprising a latch on said door,means on the door frame with which said latch is adapted to engage tohold said door in closed position, a handle on said door accessible fromthe interior of the elevator shaft for operating said latch,interengaging locking members on said door and frame for locking saiddoor in closed position and connecting means between said handle andlocking members whereby movement of said handle to release said latchdisengages said locking members, fsaid connecting means including acrank arm connected to said handle and a rod movable vertically on saiddoor to lift one of said locking members.

In witness whereof, I hereunto subscribe my name this lst day ofSeptember, A. D.,

JOSEPH RICE.

